Improvement in metallic packings for piston-rods



P. W. RICHARDS.

improvement in Metallic Packing for Piston-Rods, &c.

N0. 132,024, Patented Oct. 8,1872.

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UNITED STATES PATENT FrIo'iE.

PHILLIP W. RICHARDS, OF BOSTON, ASSIGNOR TO HIMSELF, EDWARD STONE, ANDJOHN H. CARTER, OF SAME PLACE, AND JOHN A. FULTON, OF CAM.

BRIDGE, MASSACHUSETTS.

IMPROVEMENT IN METALLIC PACKINGS FOR PISTON-RODS, &c.

Specification forming part of Letters Patent No. 132,024, dated October8, 1872.

To all whom it may concern:

Be it known that I, PHILLIP W. RICHARDS, of Boston, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Metallic Packing for Piston-Rods and Valve-Stems, ofwhich the following is a specification:

Nature of the Invention.

The nature of my invention consists in an improvement in that class ofmetallic packin gs in which metallic segments are used to bear againstthe rod, the segments being acted up on by springs for that purpose. Theimprove- Inent is essentially embraced in the use of in dependent ringsfor each set of segments; the faces of said rings, together with thecorresponding surfaces of the segments, being finished to a true plane,so that the dilI'erent rings, including the segments, will liesteamtight upon each other. All the parts are held together by springsproperly located. The invention also embraces some improvements indetails, which will be explained in the description.

' Description of the Drawing.

Figure 1 shows a vertical section of my invention; Fig. 2 is a plan ofmy packing-box, the cover being removed so as to show one of the ringsand its inclosed segments.

General Description.

Let A represent the outer box or casing. At the bottom of thisbox-thedisk E is located. This disk is perfectly flat on its upper side, asshown. The under side of this disk is provided with an annularprojection, H,

serve to press the plate E upward, and to compress the rings P P againsteach other and the upper plate B. P represents a ring, made as shown.Within this ring the segment pieces D D O O are placed. These segmentpieces are formed as shown, and are each held in place by the springs MM and screws N N. I prefer to use two of these segment-holding rings, PP, but more may be used, if desirable.

In placing these rings one upon another I so locate them that thesegment represented by O in one ring will overlay the segmentrepresented by D in the other. The cover B fits the upper face of thering with a ground joint,

and are held together by springs, it is evident I that there can be noleakage.

I claim as my invention- 1. In a steam packing-box, the combination ofthe rings P P, segments D D O G, and springs M M with the plate E andsprings L,

constructed and arranged substantially as described, and for the purposeset forth.

2. The plate E, having an annular projection, H, in combination with thesprings L and box A B, constructed and arranged substantially asdescribed, and for the purpose set forth.

PHILLIP W. RICHARDS.

Witnesses:

FRANK G. PARKER, OIIAs. J. BATEMAN.

